Furnace.



r STATEfd PATENT @FFTCE.

PHILIPPE AUGUSTE RGGHON AND ANTOINE LAURENDEAU, OE MUNTREAL, QUEBEC, CANADA, ASEIGNORS OF ONE-THIRD TO WILLIAh i ROCPION, OF IVIONTREAL, CANADA.

FURNACE.

Specification of Letters Patent.

Patented Dec. 28, 1915.

' Application filed May 22, 1915. Serial No. 29,872.

To all whom it may concern Be it known that We, PHILIPPE rlrieos'rn Rocrron and Aurora's lnxn'unisnnau, both 7 subjects of the King of Greatflritain,residing at No. as.) Dufresne streetand No. 11'

In order to more clearly disclose the construction, operation, and use of the invention, reference should be had to the accompanying drawings forming part of the present application. 7

Throughout the several figures of the drawings like reference characters designate the same parts. V

in the drawings; Figure 1 is a fragmentary side view of the furnace broken away to show the interior construction; Fig. 2 is a section on line 2-2 of Fig. 1 looking down; and Fig. 3 is a front end view of the furnace broken away to show the interior construction. 7 The objects of the invention are to provide a compact, efficient, and durable furnace specially adapted to be heated by gas generated from the coal Which Would ordinarily be used in the fire bed.

'Referring to the drawings in detail, the tubular boiler 1 of usual construction is ,mounted in the usual concrete or brick housing or casing 2 supported by a concrete base '3. At the front of the. casing 2 the base 3 is slightly raised and a brick block 4 is erected thereon. An arch 5 is provided in the centralportion of this block and extends from the front to the back thereof. On the inner face of this arch the bricks are arranged alternately on their sides and ends, those on their ends being arranged in staggered order. This provides a number of radially disposed tortuous air passages on the inner surface of the arch, for a purpose to be later disclosed. The outer end of the arch communicates With several openings 6 through the front Wall of easing 2. The end 7 of the boiler above block 4% is, of course,

' bricks which are on end bricked in in the usual manner to shut off direct communication of the arch to the flue.

A bacluvardly and upwardly inclined b0:- toni lining is provided beneath the boiler 1 composed of. a ternately arranged Whole bricks on end and half bricks on'side, the being arranged in staggered order. At the upper end of this inclined bottom lining there is an open WOI'k block of latticelike construction composed of layers of brick on edge, the rows of bricks of each layer being placed a slight distance apart and arranged at right angles to those of the next -ayer. As will be noted from Fig. 1.. there is but a very small space left between; the lower edge of the back end of the boiler l and the top edge of the inclined bottom lining and the block 7.

.At the front of the casing 2, beneath arch 5, there are several bell. shaped burners 8 in the base 3 which communicate With a gas main 9 connected up to a suitable gas generator. Each burner 8 is provided with a centrally located nipple 10 the upper end of which is slightly below the top thereof and the lower end of which communicates with a pipe 11 Within the main 9 connected to a head 12 mounted on the inner end of a compressed air supply pipe 13. This supply pipe runs longitudinally beneath the furnace, close to the surface of the bottom thereof, and is connected to a fan, tank, or other suitable source of supply of compressed air. The coal Which would ordinarily be consumed in the furnace is, in this case, fed into the generator connected to the main 9. The mixture of raw gases derived from the coal is led directfrom the generator to the burners 8 and ignited in the usual manner through openings 6. The air supply is regulated by suitable valves in pipes 11, in the usual manner. By this means suiiicient oxygen is mixed With the crude gases to insure complete combustion of the same and the production of an intense heat.

The products of combustion flow from the arch 5 backwardly along the inclined bottom and through the block 7, thence through the tubes of boiler 1 to the flue. The special arrangement of the brick lining provides openings 6. The inflowing air is retarded by the tortuous passages of the inner surfaces of the arch 5 and is thoroughly heated before entering beneath the boiler 1. In addition, the air which flows through pipe 13 is heated, after the furnace is started, from the heat retained by the bottom inclined lining of the furnace. This arrange- 'ment effectually prevents any sudden cooling of the boiler from the entry of cold air thus ehminatmg this danger and insuring a maximum of heating etliciency.

The tortuous passages formed by the pro jecting bricks in the inclined bottom form heat retaining means which causes the bricks to be quickly heated to incandescence.

These incandescent bricks radiate an intense heat and also act to ignite any gas flowing from the burners which is not consumed by the initial ignition at the furnace. This insures complete combustion of the gas as well as the radiation of intense heat, which makes it practicable to increase the supply of gas so that the flames extend well under and about the boiler l'thus making it possible to obtain avery quick generation of steam.

It is thought that the construction, operation, and use of the invention will be clear from the preceding detailed description.

Having thus fully described our invention,

what we claim as new and desire to secure by Letters Patent is:

1. In a furnace of the character described, a base provided with burners near its front end, a casing mounted on said base and pro vided with openings through its front wall, a boiler mounted in said casing, an arch erected at the front of the casingabove the i said burners and openinginto the fire boX beneath the boiler, an inclined bottom lin ing located beneath said boiler and provided with tortuous passages, an open work block located at the back end of said inclined lin-- ing, means for supplying. fuel to the said burners, and means for mixing air with the fuel supplied.

2. In a furnace of the character described;

a base; a casing mounted thereon andproa vided with openings through its front wall; a boiler mounted in said casingyan arch located at the front of thecasing and-com municating with the said op'enings and the interior of the casing, andhaving its interior surface provided with a plurality of tortuous passages; burners mounted in said base beneath the arch; a main communicatingtherewith and connected directly fto' a gas generator; an air supply; pipe mounted in said base and extending. longitudinally of" the same near the upper face thereof; pipes connected to thesaid'suaal pi e and 6X? i tending into thesaid main; nipples connected thereto and extenchngtip into the said gas burners; an open workblock at thev back of the furnace; and an upwardly and backwardly inclined bottom liningeXtend ing from the'back of the said arch to the said block and provided with a plurality of tortuous passages. In witness whereof we have hereunto set ourhands in the presence of two witnesses.

PHILIPPE AUGUSTE R OCHON. ANTOINE LAURENDEAU; v Witnesses: V i

A. BASTIAN, F. LEEMANS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. I i i 

